PLATES. 



I. to III. Illustrative of Mr, J. H. Vincent's Paper on the Photography 

 of Ripples. 



ERRATA, 



Page 50, Surface-tension Table, 1st column, for 0-8353 read 1-8353. 

 „ „ Refractive Index Table, 4th column,'/or +0-0 2 00, read +0-0 3 00. 

 „ 107, 9th line from foot of page, after " salts " insert ap and bp. 

 „ ,, 4th line from foot of page, for l p read lb. 

 „ 207, lines 26 and 34, for 3/2 read 6. 

 „ 209, line 9, for double read 3/2. 



„ „ „ 11, for 2~* or -9 read (3/2) - ^ or '93. 



„ y, „ 17, f or 2~% ov '63 read (3/2)-% or '76. 



v „ ,, 18, for 13 read 15 



„ 298, in the second table, in the column headed L;, for 80'01 read 



88 01. 

 „ 316, line 4 from bottom, for eBco read eBrco. 



